<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
	</body>
</html>
<script type="text/javascript">
	// es6允许给函数参数赋值初始值
	// 1.形参初始值 具有默认值的参数，一般位置要靠后
	function add(a,b,c=10){
		return a+b+c;
	}
	let result = add(1,2);
	console.log(result);
	// 与解构赋值结合
	function connect({host="127.0.0.1",username,password,port}){
		console.log(host)
		console.log(username)
		console.log(password)
		console.log(port)
	}
	connect({
		// host:'localhost',
		username:'root',
		password:'root',
		port:3306
	})
</script>
